 PITCH AND LEAD OF SCREW THREAD. The terms " pitch " and " lead " of screw threads are often confused. The pitch of a screw thread is the distance from the center of one thread to the center of the next thread, whether the screw has a single, double, triple,...  Machine-shop Mathematics - Page 35by George Wentworth, David Eugene Smith, Herbert Druery Harper - 1922 - 162 pagesFull view - About this book
 | Peder Lobben - Mechanical engineering - 1899 - 460 pages
...center of one thread to the center of the next, but in a triple-threaded screw the lead is three times the distance from the center of one thread to the center of the next. Screw Cutting by the Engine Lathe. When the stud and the spindle run at the same speed ( which they... | |
 | Peder Lobben - Mechanical engineering - 1899 - 460 pages
...of length; but it might more correctly be said to be a screw of ^f-inch pitch, because it is ^-inch from the center of one thread to the center of the next. The "lead" of a worm or a screw means the advancement of the thread in one complete revolution ; therefore,... | |
 | Mechanical engineering - 1900 - 428 pages
...is .866 of one of its sides, and the depth of a sharp V thread is therefore .866 of the pitch, or of distance from the center of one thread to the center of the next. Multiplying .866 by 2 we have 1.7328, and this divided by the number of threads per inch gives the... | |
 | John S. Rooke - Mechanical drawing - 1902 - 96 pages
...equal to |-inch pitch, and 5 threads per inch is equal to i-inch pitch ; because, in the former case, the distance from the center of one thread to the center of the next is ^ of an inch, and in the latter case, the distance from the center of one thread to the center of... | |
 | 1924 - 518 pages
...the ink reservoir. Screws on some bench vises are multiple threaded. Pitch. The pitch of a thread is the distance from the center of one thread to the center of the next, measured in a line parallel to the axis of the screw, or nut. Pitch is written "P." A screw having,... | |
 | Stanley Holmes Moore - Machine-shop practice - 1908 - 532 pages
...sense and in the sense in which it should always be used in referring to screw threads, "pitch" is the distance from the center of one thread to the center of the next thread, measured in a line parallel to the axis of the screw. The "threads to the inch" and "thread pitch"... | |
 | Philippines. Bureau of Education - Education - 1910 - 198 pages
...i i i .j < „ — 02 — i— -Oi$— ' 'ft- 4 .196 13 x .013 99 100 By the term "pitch" is meant the distance from the center of one .thread to the center of the next, measured parallel to the axis of the bolt. Fig. B shows the "conventional method" of representing bolt... | |
 | Robert Henry Smith - Machine-shop practice - 1910 - 408 pages
...See Multiple Threads, § 622. 211. The pitch of a thread is the distance along the axis of the work from the center of one thread to the center of the next, as P, Fig. 141. 212. The lead of a thread is the distance the screw advances in one revolution. In... | |
 | Frank Elliott Mathewson, Judson Lloyd Stewart - Mechanical drawing - 1911 - 176 pages
...pieces to be easily disconnected when necessary." ( Unwin- Machine Design) The pitch of a screw is the distance from the center of one thread to the center of the next thread, measured parallel to the axis of the screw. The lead of a screw is the distance its nut would travel... | |
 | Machine-shop practice - 1913 - 240 pages
...and the work to be cut. If, for example, we have to make a thread of 1 1/4-in. pitch, or 1 1/4 in. from the center of one thread to the center of the next, we can proceed as follows: As the threads of the lead screw are 1/4 in. apart, it is very evident that... | |
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